Yah, I've been having the same problems, and I'm just starting out. I've gone through 3 tubes and I've had my trials bike for a week. I'm going to try the cut up tube around the new one. It should work, because I have the smallest pinches on Earth, I swear. Today I got one, and I had to walk at least 5km back home. Thank goodness it didn't rain, as it looked like it was going to